Function libheif_sys::heif_image_handle_get_thumbnail

pub unsafe extern "C" fn heif_image_handle_get_thumbnail(
    main_image_handle: *const heif_image_handle,
    thumbnail_id: heif_item_id,
    out_thumbnail_handle: *mut *mut heif_image_handle
) -> heif_error

Get the image handle of a thumbnail image.